JP2979217B2 - Vacuum cleaner suction body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port of a vacuum cleaner.

[0002]

2. Description of the Related Art Generally, a vacuum cleaner having a rotary brush driven by a dedicated motor is known as a suction port body. In some cases, the rotating brush is driven via a timing belt. Further, as a suction port body of a vacuum cleaner, a suction port body having a substantially T-shape is also known so that the floor, for example, from the front side of a table leg to the back side thereof can be easily cleaned. In order to provide the rotary brush and make the suction port body substantially T-shaped, it is necessary to dispose a pulley on which the timing belt is hung at a portion other than both ends where the rotary brush is supported.

When the floor surface to be cleaned is a carpet or a carpet with long hairs, the rotational load of the rotating brush becomes unusually large, and the timing belt does not stretch by itself. Is well known. When the rotary brush is driven via this timing belt, when the load becomes abnormally large as described above, the shaft of the rotary brush or the motor, the bearing, or the case supporting the bearing is bent, so that the motor, the rotary brush and The distance between the pulleys is slightly reduced,
Belt skipping may occur. Belt skipping places excessive mechanical fatigue on belts, pulleys, and bearings.

[0004]

As described above, in a mechanism for transmitting rotation through a belt, it is important to keep the distance between the driving pulley and the driven pulley constant at all times. The present invention is a suction port body of a vacuum cleaner having a rotating brush, wherein the rotating brush is driven by a motor via a timing belt, and a pulley for hanging the timing belt in the rotating brush is supported by the rotating brush. The suction side of the vacuum cleaner which can always keep the distance between the drive side, that is, the pulley on the motor side, and the driven side, that is, the pulley on the rotating brush side. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the above-mentioned object, the present invention provides a vacuum cleaner having a rotating brush, wherein the rotating brush is provided with a timing belt. A pulley driven by a motor through which the timing belt of the rotary brush is hung is provided at a portion other than both ends where the rotary brush is supported. The pulley is provided with a drive shaft of the motor and the timing belt of the rotary brush. Ball bearings are provided in the immediate vicinity of the pulleys for hanging the ball bearings, and a rigid member that contacts the outer ring of each of the ball bearings is provided in the case of the suction port body along a straight line connecting these ball bearings. It is assumed that.

[0006]

In the suction opening of the vacuum cleaner constructed as described above, the distance between the pulleys does not change even if the load on the rotating brush becomes abnormally large. Therefore, the occurrence of the belt skip described above is substantially eliminated.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a view in which an upper case of a suction port body of a vacuum cleaner is removed so that the inside can be seen. As is well known, a motor 2 is fixed to the lower case 1 and a rotating brush 3 is housed therein. Both ends of the rotating brush 3 are rotatably attached to the lower case 1 by bearings 4 and 4 (only one bearing is shown). And
The rotating brush 3 is provided with a flocking 5 and a beater 6. Pulleys 7 and 8 are fixed to a portion of the rotating brush 3 excluding the both ends and a shaft of the motor 2, respectively.
A timing belt 9 is hung on these pulleys 7 and 8. An opening 10 serving as a suction port is provided on a bottom surface of the lower case 1 along the rotating brush 3, and a cover 11 that covers the belt 9 is integrally formed. The suction body of the vacuum cleaner configured as described above is already known.

[0008] Well-known ball bearings 12, 13 are provided immediately near the shaft of the motor 2 and the pulleys 7, 8 of the rotating brush 3, and these bearings 12, 13 are provided.
A rigid member 14 made of a metal plate is disposed in contact with the outer rings of the bearings 12 and 13 along a straight line connecting the bearings 12 and 13. The rigid member 14 is fixed to the lower case 1 by screws (not shown).

[0009] In the suction opening of the vacuum cleaner constructed as described above, the distance between the pulleys 7 and 8 is reduced by the rigid member 14.
Therefore, the above-mentioned belt skip does not occur. Such a configuration is a case where the tip of the shaft of the motor 2 is not supported by the lower case 1 as in the above-described embodiment.
It is particularly advantageous if the pulley 7 is separated from the bearing 4 of the rotary brush 3.

[0010]

As described above, in the suction opening of the vacuum cleaner according to the present invention, the distance between the shaft of the motor 2 and the pulleys 7, 8 provided on the rotary brush 3 can be kept constant. Therefore, the above-described belt skip can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 lower case 2 motor 3 rotating brush 4 bearing 5 flocking 6 beater 7,8 pulley 9 timing belt 10 opening 11 cover 12,13 ball bearing 14 rigid member

Claims (1)

(57) [Claims] 1. A suction port of a vacuum cleaner having a rotating brush, wherein the rotating brush is driven by a motor via a timing belt, and a pulley for hanging the timing belt in the rotating brush has a bearing which is a bearing. Ball bearings are provided in the vicinity of the drive shaft of the motor and the pulley for hanging the timing belt in the rotating brush, respectively, and a straight line connecting these ball bearings is provided. A suction port body for a vacuum cleaner, wherein a rigid member that contacts the outer ring of each of the ball bearings is provided along a case of the suction port body.